Brake.



- E. S. ROBINSON.

BRAKE. APPLIoATI'oN rILxzn JUNE 3,1913.

Patented Apr. 7. 1914.

2 SHEETS-SHEET 1.

E. S. ROBINSON.

Patented Apr. 7, 1914.

2 SHEETS-SHEET 2.

center of the machine. I section on the lineB-S of Fig. 1. Fig. 4'

:EDW'ARIJ` S. ROBINSON, OF OROVILLE, CALIFORNIA, `.ASSIGNOR TO GOLDEN WEST MOTORS COMPANY, OF SACRAMENTO, C!'.AIZIFORN'IA,` A G(,JRIEOIEM-MILTON` 0F CALI- i FORNIA.

Specication of Letters Patent.

Application filed. .Tune 3, 1913. Serial No. 771,488.

BRAKE.

Patented Apr'. 7,1914.

To all whom 'it may concern Be it known that I, EDWARD S. ROBINSON, a citizen of the United States, residing at Oroville, in the county of But/te and State of California, have invent-ed new and useful Improvements in Brakes, of which the following is a specification.

This invention relates to brakes of the class generally used upon automobiles, motor trucks and other motor driven yehicles, the object in View being to provide what is known as an internal expanding brake which operates in conjunction with a brake drum carried by and having a fixed relation to one of the wheels of the machine. The main object of the inventionv is to provide, in connection with a brake drum related to the wheel in the manner above. stated, novel means for supportmg and ad-` mittingof the necessary movements of .the expanding brake band, said supporting means for the brake band being formed on the housing of the axle, by which the adf` combination and arrangement of part-s, asv

will be hereinafter more fully described, illustrated .in the accompanying drawings, and pointed out in the claims hereunto appended.

In the drawings: Figure 1 is a vertical section showing the brake of this invention used in connection with one of the Wheels of a vehicle. Fig. 2 is a vertical section on the line 2-2 of Fig. 1, looking toward the Fig. 3 lisa vertical is a diametrical'section through the mechanism.`

Referring to the drawings, 1 .designates one of the wheels of an automobile, motor truck, or other motor driven vehicle, and 2 the axle which is shown as having a driving connection with said wheel, the axle 2 being mounted in a `housing 3.

Secured in fixed relation to the Wheel 1 and' arranged on the inner side thereof is a brake drum comprising the rim 4, and body or web 5, the latter beingshown as having the spokes 6 of the wheel fastened thereto by means of bolts 6 which also pass through the flange 7 of a hub cap 8, the hub being shown as fastened on the spindle 9 by means of a cap'nut 10. The spindle 9 and the axle 2 are shown as coupled together by means of a ball and Socket coupling, embody'- ing the ball member 11 and socket member 12. This forms auniversal joint between thel axle 2 and the spindle 9, by means of which the motion of the axle 2 is transmitted to the spindle 9, while at the same time permitting the turning of the wheel 1 in the operation of steering the machine.

In carrying out this invention, the axle housing 3 is provided with two band supporting arms 13 and 14 arranged one above the other, as shown in Fig. 1, each of said arms 13` and 14 being provided with a hole 14 to receivefa pintle 15 which extends radially from one of the brake lband sectionsf with respect to the axis of the wheel, said pintles being located in line with'the pivotal connection between the axle 2 and the spindle 9. Extending around and supported upon and by the arms 13 and 14 is an expanding` brake band B, said band being of sectional construction, as shown in Fig. 3,16 designating the larger and longer section of the band, andfl? a relatively shorter section, the 'extremities of the. twosections 16 and 17 abutting on oblique lines 18, whereby in the expanding action of the 'section 16, the extremities of the lastenamed section act with a wedging effect on the abutting extremities of the smaller section 17, thereby causinga simultaneous outward or expansive movement of they section 17. i

v i In order to expand the brakebandll employ a pair of links 19 and 20 pivotally connected tothe larger band section 16, at

frictional 'contact with the inner face of the.

brake drum. The pintles 15 admit of the expansion of the brake band, While at the same time insuring the holding of the brake band in fixed relation to the axle housing 3.

23 designates a cam or eccentric which is provided with an operating shaft 211 having an arm 25, from which a suitable rod or other connection is adapted to extend to the manually controlled brake lever Within reach of the driver of the machine. The cam or eccentric 23 coperates with a roller 26 on the rod or pin 22, above referred to, serving to move said pin outwardly toward the periphery of the drum, causing the links to expand the sectional'brake band. A spring` 27 acts in opposition'to the cam 23 to force the pin 22 inwardly and release the brake, after the brake lever is released. In addi,- tion to the arms 13,and 14, the axlehousing 3 is provided with another set of knuckle supporting arms 28, between which 1s plvotally mounted the knuckle 29, said knuckle being pivoted, at 30, in the arms 28, the last-named .pivots being located in line with the pintles 15, hereinabove described.V By reason of this arrangement of parts, when the wheel 1 is turned for the purpose of steering the machine, a simultaneous turning of the brake band B is eected, thus preserving the proper relationship between the brake band and the brake drum, and ena.- bling the brake to be applied, irrespective of the angle assumed by the wheel.

A ball bearing 31 is-preferably arranged in the upper arm 28, so as to carry the weight of the machine on the knuckle 29 to enable the wheel to be turned with greater ease andr with a minimum amount of friction.

From the foregoing description, it will be seen that the brake band is eiectively supported by the axle housing and thoroughly braced relatively to said housing, the construction referred to also serving as an effective brace for the hub of the wheel, the inner face of said hub bearing directly along the line 33 against the adjacent outer face of the knuckle 29, as shown in Fig. 1.

What is claimed is:

1. In brake mechanism for motor vehicles, a driving axle, an axle housing, a wheel driving spindle, a universal joint .between said axle and spindle, a driving and steering wheel on said spindle, a brake drum fast on said wheel, upper and lower brake band supporting arms on said axle housing in spaced relation to each other and formed with pintle holes extending in a common diametrical line, an internal expanding brake band-supported by said arms, pintles-on said brake band slidable in said holes in the supporting arms and upon which pintles as a center the brake band is adapted to turn, and means for operating said brake band.

v 2. In brake mechanism for motor vehicles, a driving axle, an axle housinga wheel driving spindle, a universal joint between said axle and spindle7 a driving and steering wheel on said spindle, a brake drum fast on said wheel, upper and lower brakeband supporting arms on said axle housing in spaced relation to each other and formed with pintle holes extending in a common diametrical line, an internal expanding brake band supported by said arms, pintles on said brake band slidable in said vholes in .the supporting arms and upon which pintles upper and lower brake band supporting arms on said axle housing in spaced relation to each other, an internal expanding brake band supported by said arms, pintlesconnecting said brake band and arms at diametrically opposite points, permitting the band to turn on said pintles as a center and also slide radially with respect to the center of the wheel, pivotally connected links having a jointed connection with said band for expanding the latter into contact with the Y drum, a roller on the pivot connecting said links, and a manually operated eccentric bearing against said roller.

. 4. In braking mechanism for. motor vehicles, an axle housing, a wheel driving spindle, a universal joint between said axle and spindle, a driving and steering wheel on said spindle, a brake drum fast on said wheel, upper and lower brake band supporting arms on said axle housing in spaced relation to each other, a sectional internal expanding brake band supported by said arms, pintles on the sections of said brake band connecting said brake band and arms at diametrically opposite points, permitting the band to turn on said pintles as a center and also slide radially with respect to the center of the wheel, pivotally connected links having a jointed connect-ion 4with said band for expanding the latter into contact with the drum, aroller on the pivot connecting said links, a manually operated eccentricA bearing against said roller, and a band contracting spring interposed between one of said supporting arms and the point of junction of said links and acting directly upon said links.

5. A brake for motor driven vehicles comprising in combination with a steering wheel, a drivlng axle for said wheel, a wheel spindle connected with said axle by a universal joint, a housing for said axle, upper and lower arms on said housing in spaced relaiinn if @zich Hillel', n brake drinn vm'ried by Suid wheel, :1n internal expanding brake lmml supported by said :mns und mounted thereon t0 turn on the sanne nxisns the steeringr wheel, means for expanding said brake bund into engagement with smid (l1-uni, upper and lower knuckle snppmiing arms 0n said housing, and n steering wheel knuckle pivotally supported by the last-named arms to turn on the same axis as the brake band. 10 In testimony whereof I ax my signature in presence of two witnesses.

EDWARD S. ROBINSON. Witnesses:

FRANK G. MOONEY, K. M. RolNsoN. 

